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Bilbao, Spain
Bilbao, Spain

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Bontoiu C.,University of Huelva | Martel I.,University of Huelva | Gomez C.,IDOM | Falone A.,TTI
IPAC 2014: Proceedings of the 5th International Particle Accelerator Conference | Year: 2014

LINCE heavy-ion facility [1] makes use of a low-energy ion linac consisting of quarter-wave resonators (QWRs) designed for β = 0.045, 0.077 and 0.15 working at 72.75 MHz and 109.125 MHz, and solenoid magnets distributed along four different cryomodules. Particle tracking studies have been performed using realistic electric and magnetic field maps to reach the final energy of 8.5 MeV/u for A/Q = 7 ions. Copyright © 2014 CC-BY-3.0 and by the respective authors.


Mendikoa I.,University of the Basque Country | Sanchez-Lavega A.,University of the Basque Country | Perez-Hoyos S.,University of the Basque Country | Hueso R.,University of the Basque Country | And 6 more authors.
Publications of the Astronomical Society of the Pacific | Year: 2016

We present PlanetCam UPV/EHU, an astronomical camera designed fundamentally for high-resolution imaging of Solar System planets using the "lucky imaging" technique. The camera observes in a wavelength range from 380 nm to 1.7 μm and the driving science themes are atmosphere dynamics and vertical cloud structure of Solar System planets. The design comprises two configurations that include one channel (visible wavelengths) or two combined channels (visible and short wave infrared) working simultaneously at selected wavelengths by means of a dichroic beam splitter. In this paper the camera components for the two configurations are described, as well as camera performance and the different tests done for the precise characterization of its radiometric and astrometric capabilities at high spatial resolution. Finally, some images of solar system objects are presented as well as photometric results and different scientific cases on astronomical targets. © 2016. The Astronomical Society of the Pacific. All rights reserved.


Cicero S.,University of Cantabria | Garcia T.,IDOM | Alvarez J.A.,University of Cantabria | Bannister A.,Tata Steel | And 3 more authors.
Procedia Engineering | Year: 2016

This paper evaluates the effect of different thermal cutting methods on the fatigue life of high strength steel S890Q. The investigation covers flame, plasma and laser cutting methodologies, and specimens with rectangular sections and cut straight edges. The experimental program is composed of 30 specimens that were conducted to failure by applying fatigue cycles with a stress ratio (R) of 0.1 in a high frequency testing machine. The resultant best-fit S-N curves have been compared, revealing a better performance for laser cut straight edges. Moreover, the corresponding Eurocode 3 FAT class has been derived for each of the three cutting methods, resulting in FAT160 in all cases. This suggests that the use Eurocode 3 FAT125, which is the fatigue class currently provided for flame cut straight edges, is an overconservative assumption for thermally cut straight edges in steel S890Q, regardless of the thermal cutting technique being used (flame, laser or plasma). © 2016 The Author(s).


Gomez C.,IDOM | Aviles A.,IDOM | Bilbao A.,IDOM | Siepe D.,GERB Schwingungsisolierungen GmbH and Co.KG | Nawrotzki P.,GERB Schwingungsisolierungen GmbH and Co.KG
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2012

During the E-ELT Dome and Foundations FEED Study, IDOM developed a Base Control System for protection of the E-ELT Main Structure against the effect of high level earthquakes. The proposed design was aimed to provide an effective isolation during heavy seismic events, whereas in normal observation conditions it presented a high stiffness to avoid interferences with the pointing accuracy of the telescope. In a subsequent phase, a representative prototype was envisaged by IDOM, in close collaboration with GERB, to evaluate the performance of this system, correlate the results from prototype testing with the behaviour predicted by a calculation model and finally validate the design conceived during the FEED Study. The assessment of the results from the prototype tests has been focused on checking the level of compliance with the demanded requirements: 1) the Base Control System isolates the upper structure from ground in case of high magnitude seismic events; 2) in operational conditions, the system -by means of Preloaded Devices (PLDs)- provides a stiff interface with the ground; 3) regarding the performance of the PLDs, the finite element model simulates accurately the non-linear behaviour, particularly the zero crossing when the direction of the excitation changes; 4) there is no degradation of the stiffness properties of the seismic devices, after being submitted to a heavy seismic event. The prototype was manufactured by GERB and pseudo-integrated tests were performed on a shaking table at the premises of the Institute of Earthquake Engineering (IZIIS) in Skopje, Macedonia. © 2012 SPIE.


Murga G.,IDOM | Sanquirce R.,IDOM | Campo R.,IDOM | Oscoz A.,Institute of Astrophysics of Canarias | And 2 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2010

FastCam is an instrument jointly developed by the Instituto de Astrofísica de Canarias (IAC) and the Universidad Politécnica de Cartagena (UPCT), designed to obtain high spatial resolution images in the optical wavelength range from ground-based telescopes (http://www.iac.es/ proyecto/fastcam and http://www.iac.es/telescopes/Manuales/manualfastcam.pdf). The instrument is equipped with a very low noise and very fast readout speed EMCCD camera which provides short exposure images to an FPGA-based processor which performs the selection, recenterg and combination of images in real-time (applying Lucky Imaging techniques) to provide diffraction limited resolution images in 1-4 m class telescopes from 500 to 1100 nm. IDOM has contributed to this new state-of-the-art instrument with the design of an optomechanical system conceived to maximize the image scale stability of the system for astrometry. The combination of aluminum plates, carbon fiber (CFRP) rods and stainless steel mounts in the optical bench defines an athermalized and stiff design to meet the requirements of thermal and mechanical stability. This work has been done with the support of the Aerospace Subprogramme of the Spanish Centre for the Development of Industrial Technology (CDTI) and the INTEK programme of the Basque Development Agency (SPRI). © 2010 Copyright SPIE - The International Society for Optical Engineering.


Bilbao A.,IDOM | Bilbao A.,Advanced Design and Analysis Group | Aviles R.,Escuela Tecnica Superior de Ingenieria | Aguirrebeitia J.,Escuela Tecnica Superior de Ingenieria | Bustos I.F.,Escuela Tecnica Superior de Ingenieria
AIAA Journal | Year: 2011

Vibratory dynamics of variable geometry trusses (VGT) is studied and a tool is developed to efficiently estimate the dynamic properties of VGTs throughout their movement. A procedure for estimating the variation of natural frequencies and vibration modes of VGTs during their movement, making it unnecessary to recalculate them at all positions but just for a small number thereof, is presented. To calculate the derivatives of modes and frequencies, the stiffness matrix derivatives are calculated with respect to the nodal coordinates. To model the variations of frequencies and modes throughout VGT evolution, linear estimation is used, which obtains natural frequencies and vibration modes in a new position from their values in a previous position. The derivatives of the natural frequencies and vibration modes are calculated in relation to the nodal coordinates for a reference position.


Bilbao A.,IDOM | Murga G.,IDOM | Gomez C.,IDOM | Llarena J.,IDOM
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2014

The E-ELT as a whole could be classified as an extremely challenging project. More precisely, it should be defined as an array of many different sub-challenges, which comprise technical, logistical and managerial matters. This paper reviews some of these critical challenges, in particular those related to the Dome and the Main Structure, suggesting ways to face them in the most pragmatic way possible. Technical challenges for the Dome and the Main Structure are mainly related to the need to upscale current design standards to an order of magnitude larger design. Trying a direct design escalation is not feasible; it would not work. A design effort is needed to cross hybridize current design standards with technologies coming from other different applications. Innovative design is therefore not a wish but a must. And innovative design comes along with design risk. Design risk needs to be tackled from two angles: on the one hand through thorough design validation analysis and on the other hand through extensive pre-assembly and testing. And, once again, full scale integrated pre-assembly and testing of extremely large subsystems is not always possible. Therefore, defining a comprehensive test plan for critical components, critical subsystems and critical subassemblies becomes essential. Logistical challenges are linked to the erection site. Cerro Armazones is a remote site and this needs to be considered when evaluating transport and erection requirements. But it is not only the remoteness of the site that needs to be considered. The size of both Dome and Main Structure require large construction cranes and a well defined erection plan taking into account pre-assembly strategies, limited plan area utilization, erection sequence, erection stability during intermediate stages and, very specifically, efficient coordination between the Dome and the Main Structure erection processes. Managerial issues pose another set of challenges in this project. Both the size of the project and its special technical characteristics require specific managerial skills. Due to the size of the project it becomes essential to effectively manage and integrate a large number of suppliers and fabricators, of very different nature and geographically distributed. Project management plans need to cope with this situation. Also, extensive on site activities require intensive on site organization in line with large construction management strategies. Finally, the technical edge of the project requires deep technical understanding at management level in order to be able to take sound strategic decisions throughout the project in terms of the overall project quality, cost and schedule. © 2014 SPIE.


Bilbao A.,IDOM | Murga G.,IDOM | Gomez C.,IDOM
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2012

During the last two years a modified baseline design for the E-ELT was developed. The aim of this revision was both to achieve a significant cost saving and to reduce risk on major items. The primary mirror diameter was slightly reduced to 39 m and the total height of the telescope also decreased accordingly. This paper describes the work performed by IDOM under contract with ESO to review the EELT dome and foundations design to match the modified baseline. Detailed design and construction planning, as well as detailed cost estimates were updated for the 39-metre baseline design. In June 2011, ESO Council formally endorsed this modified design as the E-ELT revised baseline. Key redesign drivers are explained and final redesign details of all major subsystems are outlined. In general, the original compact dome design philosophy is maintained and adapted to the new dimensions. Cost optimisation strategies are applied throughout the detailed design update process. Special attention is also given to some specific new items now included in the modified baseline, such as the special ad-hoc seismic base isolation system for the telescope foundation. © 2012 SPIE.


Larena A.B.,Technical University of Madrid | Menendez D.G.,IDOM
Structural Engineering International: Journal of the International Association for Bridge and Structural Engineering (IABSE) | Year: 2014

Reciprocal frame structures, formed by a set of self-supported elements in a closed circuit, have long been used since antiquity to cover large spans with small elements. The roof structure of the Euskalduna conference centre and concert hall extension in Bilbao, covering an irregular geometry of 3000 m2 with a maximum span of 45 m, presented an interesting opportunity to revisit the concept and to apply these classical systems. Furthermore, its analysis and development led to an interesting discussion on reciprocal frames. They showed great sensitivity of these systems to the local modification of a particular element, establishment of irregular load paths, mobilisation of almost the entire system when locally applying a punctual load and, finally, its large deformability. Besides, reciprocal frames present particular construction complexities and possibilities due to the moderate length of the structural elements, the predominance of shear-only connections and the necessity of the entire system to be completely erected to guarantee its stability. Euskalduna extension, completed in 2012, is one of the largest and a very particular case of irregular reciprocal frame structures built in the world. It shows the formal possibilities and potentiality of reciprocal frames to respond to free and irregular geometries. © 2014 Publishing Technology.


Murga G.,IDOM | Bilbao A.,IDOM | Vizcarguenaga A.,IDOM | Eletxigerra I.,IDOM | And 3 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2010

As a continuation of the Preliminary Design of the Dome for the European Extremely Large Telescope (E-ELT) proposed by IDOM, the Detail Design for the E-ELT Dome has been developed with the objective of optimizing the design to minimize the manufacturing, erection and operation costs. The proposed design is based on a hemispherical dome tightly fitted to the dome design volume to minimize the enclosed volume and consequently the cost. The large observing slit, large as compared to the dome diameter, is covered by means of two horizontal biparting doors. This paper summarizes the most significative changes in the design and the approach followed by IDOM for the detailed design process, with emphasis in the construction process. The design work presented in this paper has been performed under contract with the European Southern Observatory (ESO). © 2010 SPIE.

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